68 lines
2.1 KiB
Go
68 lines
2.1 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package bigquery
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import "golang.org/x/net/context"
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// RecordsPerRequest returns a ReadOption that sets the number of records to fetch per request when streaming data from BigQuery.
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func RecordsPerRequest(n int64) ReadOption { return recordsPerRequest(n) }
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type recordsPerRequest int64
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func (opt recordsPerRequest) customizeRead(conf *pagingConf) {
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conf.recordsPerRequest = int64(opt)
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conf.setRecordsPerRequest = true
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}
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// StartIndex returns a ReadOption that sets the zero-based index of the row to start reading from.
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func StartIndex(i uint64) ReadOption { return startIndex(i) }
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type startIndex uint64
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func (opt startIndex) customizeRead(conf *pagingConf) {
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conf.startIndex = uint64(opt)
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}
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func (conf *readTableConf) fetch(ctx context.Context, c *Client, token string) (*readDataResult, error) {
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return c.service.readTabledata(ctx, conf, token)
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}
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func (c *Client) readTable(t *Table, options []ReadOption) (*Iterator, error) {
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conf := &readTableConf{}
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t.customizeReadSrc(conf)
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for _, o := range options {
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o.customizeRead(&conf.paging)
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}
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return newIterator(c, conf), nil
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}
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func (conf *readQueryConf) fetch(ctx context.Context, c *Client, token string) (*readDataResult, error) {
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return c.service.readQuery(ctx, conf, token)
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}
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func (c *Client) readQueryResults(job *Job, options []ReadOption) (*Iterator, error) {
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conf := &readQueryConf{}
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if err := job.customizeReadQuery(conf); err != nil {
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return nil, err
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}
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for _, o := range options {
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o.customizeRead(&conf.paging)
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}
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return newIterator(c, conf), nil
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}
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